Walker S2 vs Iron: which robot wins?
UBTech's Walker S2 against XPeng's Iron — price, capability, availability, and a verdict you can act on.
| Walker S2 | Iron | |
|---|---|---|
| EST. PRICE | Enterprise pricing | Not yet priced |
| HEIGHT | ~5′6″ / 170 cm* | ~5′8″ / 173 cm |
| WEIGHT | ~65 kg* | ~70 kg* |
| PAYLOAD | ~15 kg* | Factory task class* |
| RUNTIME | Hot-swappable battery (self-swap) | Undisclosed |
| DEXTERITY | Dual 7-DOF arms* | ~60+ total DOF; humanlike gait* |
| AVAILABILITY | Industrial only | Coming |
| WHICHBOT SCORE | 8.2 / 10 | 7.5 / 10 |
| OUR TAKE | The factory workhorse from China’s most established humanoid maker — famous for swapping its own battery to work around the clock. | China’s answer to Optimus — an EV maker converting its car-factory muscle into humanoids, starting on its own production lines. |
* Prices are estimates from public statements and filings. Availability changes weekly.
Detailed comparison: Walker S2 vs Iron
Walker S2 scores 8.2/10 in our independent evaluation; Iron scores 7.5/10. That 0.6999999999999993-point gap reflects real differences in capability or value, but Iron may still win if its strengths match your priorities.
Walker S2 is best for: Businesses evaluating proven factory humanoids with 24/7 ambitions. Iron is best for: Tracking whether the Tesla playbook works twice — this time from Guangzhou.
Our scoring weighs five factors: autonomous capability, independent verification (third-party evidence scores higher than manufacturer claims), commercial deployment scale, price-to-capability ratio, and real-world availability today. Neither robot here is scored on marketing alone. Walker S2 and Iron are both worth evaluating — the right call depends on which robot's documented strengths match your actual workflow.
CHOOSE THE WALKER S2 IF…
- Businesses evaluating proven factory humanoids with 24/7 ambitions.
- Autonomous battery self-swap enables near-continuous operation
- Real deployments: auto plants, logistics, aircraft assembly trials
CHOOSE THE IRON IF…
- Tracking whether the Tesla playbook works twice — this time from Guangzhou.
- EV-manufacturer scale and supply chain behind it
- Notably humanlike gait and hands in public demos